问带有行高变量的DBGRID
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Stack Overflow用户

提问于 2015-08-27 10:10:13

回答 1查看 5.8K关注 0票数 2

我想在DBGRID中显示如下：

想象一下“网格”如下：

ID -描述

1-网格的第1行

2-网格的第2行

3-网格的第3行

现在，假设DESCRIPTION列的大小被更改，不再显示单词"GRID"；

我也想待在DBGRID

ID -描述

1-第1行

准准格网

2-第2行

准准格网

3-第3行

准准格网

有可能吗?？

delphi

delphi-xe

回答 1

Stack Overflow用户

回答已采纳

发布于 2015-08-27 11:01:20

不是你想要的但可能会有帮助..。我曾经使用这段代码在标准DBGrid中显示完整的备注字段：

  TMyForm = class(TForm)
    ...
  private
    FormMemoRect: TRect;
    MemoGrid: TDBGrid;
    BMemo: TBitBtn;
    ...

Procedure TMyForm.FormMemoDeactivate(Sender: TObject);
Begin
    (Sender As TForm).Close;
    Sender.Free;
End;

Procedure TMyForm.BMemoClick(Sender: TObject);
Var FormMemo: TForm;
Begin
    MemoGrid.SetFocus;

    FormMemo := TForm.Create(Self);
    With TMemo.Create(FormMemo) Do Begin
        Parent := FormMemo;
        Align := alClient;
        ReadOnly := True;
        WordWrap := True;
        ScrollBars := ssVertical;
        Lines.Text := MemoGrid.DataSource.DataSet.Fields[TComponent(Sender).Tag].AsString;
    End;

    With FormMemo Do Begin
        OnDeactivate := FormMemoDeactivate;
        Left := FormMemoRect.Left;
        Top := FormMemoRect.Top;
        Width := Max(FormMemoRect.Right - FormMemoRect.Left, 300);
        Height := FormMemoRect.Bottom - FormMemoRect.Top;
        BorderStyle := bsNone;

        Show;
    End;
End;

Procedure TMyForm.GrdMemoDrawColumnCell(Sender: TObject; Const Rect: TRect; DataCol: Integer; Column: TColumn; State: TGridDrawState);
Begin
    If (gdFocused In State) Then Begin
        If Column.Field.DataType In [ftBlob, ftMemo] Then Begin
            {Desenha botão para visualização do Memo}
            FormMemoRect.Left := TWinControl(Sender).ClientToScreen(Rect.TopLeft).X;
            FormMemoRect.Right := TWinControl(Sender).ClientToScreen(Rect.BottomRight).X;
            FormMemoRect.Top := TWinControl(Sender).ClientToScreen(Rect.BottomRight).Y;
            FormMemoRect.Bottom := FormMemoRect.Top + 100;

            If Not Assigned(BMemo) Then
                BMemo := TBitBtn.Create(Self);
            BMemo.Parent := TWinControl(Sender).Parent;
            BMemo.Width := 16;
            BMemo.Height := 16;
            BMemo.Caption := '...';
            BMemo.OnClick := BMemoClick;
            BMemo.Tag := Column.Field.Index;
            BMemo.Left := TWinControl(Sender).Left + Rect.Right - BMemo.Width + 1;
            BMemo.Top := TWinControl(Sender).Top + Rect.Top + 2;

            MemoGrid := TDBGrid(Sender);
        End
        Else
            FreeAndNil(BMemo);
    End;
End;

对于Blob/Memo字段，您可能还发现执行一些自定义GetText以直接在网格中显示某些内容是有用的：

Procedure TMyForm.DataSetMemoGetText(Sender: TField; var Text: String; DisplayText: Boolean);
Begin
    Text := Copy(Sender.AsString, 1, 50);

    If Text <> Sender.AsString Then
        Text := Text + '...';
End;